Sulfonate-based compound and polymer electrolyte membrane using same
a technology of polymer electrolyte and compound, which is applied in the direction of organic compound/hydride/coordination complex catalyst, cell component, physical/chemical process catalyst, etc., can solve the problems of fuel cell failure, microscopically damaged interface between the polymer electrolyte membrane and the catalyst layer, etc., to achieve excellent durability and efficiency, excellent ionic conductivity, and low ion exchange capacity value
Active Publication Date: 2015-11-19
LG CHEM LTD
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Benefits of technology
[0022]A polymer electrolyte membrane prepared by using the sulfonate-based compound of the present specification easily forms a hydrophilic-hydrophobic phase separation structure.
[0023]Further, a polymer electrolyte membrane including the sulfonate-based compound of the present specification efficiently forms a hydrophilic channel in the polymer electrolyte membrane by controlling a phase separation structure.
[0024]In addition, a polymer electrolyte membrane including the sulfonate-based compound of the present specification is excellent in ionic conductivity.
[0025]Furthermore, a polymer electrolyte membrane including the sulfonate-based compound of the present specification has a low ion exchange capacity (IEC) value.
[0026]Further, a fuel cell including the polymer electrolyte membrane is excellent in durability and efficiency.
Problems solved by technology
When the wet state of the polymer electrolyte membrane is changed as described above, the polymer electrolyte membrane is subjected to alternating between swelling and shrinkage by water absorption / drying, and thus, a defect sometimes occurs in that the interface between the polymer electrolyte membrane and the catalyst layer is microscopically damaged.
Further, in extreme cases, failure of the fuel cell may also be caused.
Method used
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example 1
[0232]
[0233]A sulfonate-based compound according to an exemplary embodiment of the present specification was synthesized by using the compound.
[0234]1,4-biphenol (0.001 mol) and the synthesized sulfonate-based compound (0.001 mol) according to an exemplary embodiment of the present specification were polymerized at 140° C. for 4 hours and at 175° C. for 15 hours, and polymerized by using dimethyl sulfoxide (DMSO) as a solvent, and thereafter, the resulting polymer was sufficiently cooled at room temperature, then a secondary monomer (0.0001 mol) was introduced thereto, and toluene and dimethyl sulfoxide (DMSO) were added thereto to allow the mixture to be reacted for polymerization at 140° C. for 4 hours and at 175° C. for 15 hours. Thereafter, the product was cooled down at room temperature and precipitated in ethanol to obtain a polymer resin.
[0235]The synthesized resin was solution-coated with a 10 wt % solution (solution DMSO). The resulting resin was dried at 100° C. in an oven...
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Abstract
The present specification relates to a sulfonate-based compound and a polymer electrolyte membrane using the same, a membrane electrode assembly including the same, and a fuel cell including the same.
Description
TECHNICAL FIELD[0001]The present specification relates to a sulfonate-based compound and a polymer electrolyte membrane using the same.[0002]This application claims priority to and the benefit of Korean Patent Application No. 10-2013-0068547, filed in the Korean Intellectual Property Office on Jun. 14, 2013, the entire contents of which are incorporated herein by reference.BACKGROUND ART[0003]A solid polymer-type fuel cell (hereinafter referred to as a “fuel cell” in some cases) is a power-generating device that generates electricity using the chemical reaction of a fuel gas (examples thereof include hydrogen) with oxygen, and is greatly expected to play a role as one of the next-generation resources for energy in the fields of electric appliance industry, automobile industry, or the like. The fuel cell is composed of a basic unit having two catalyst layers and a polymer electrolyte membrane interposed between the two catalyst layers.[0004]When the power-generating mechanism of a fu...
Claims
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IPC IPC(8): B01J39/18H01M8/10C07C309/10
CPCB01J39/185C07C309/10H01M2008/1095H01M8/1048H01M8/1004C07F1/06C08J5/2262C08J2371/00C08J2371/12Y02E60/50C08G75/23C08J5/2206B01J31/0222
Inventor YOO, JOUNGEUNSHIN, CHONG KYUJEONG, SEUNGPYOKIM, YOUNGJEALEE, JONG-CHAN
Owner LG CHEM LTD
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